Production of printing-surfaces with relief effect.



UNITED sTATEs PATENT oEEioEx.

NIELs BENDIXEN, or COPENHAGEN, DENMARK, AssrefNoK To HANS HENDRIK LTzHET-PETERSEN, or corENHAGEN, DENMARK.

PRODUCTION OF PRINTING-SURFACES WITH RELIEF EFFECT..

T0 all whom t may concern.'

Be it known that I, NiELs BENDIxEN, subject of the King of Denmark, whose postoflice address and residence is Studiestraede 28, Copenhagen, Denmark, have invented new and useful Improvements in the production of Printing-Surfaces with Relief Effect, of which the following is a specification.

It is known t0 produce printing surfaces (for instance metal block, lithgraphic stones, heliotype plates, copper printing plates etc.) in such a manner that the prints made therefrom show a relief effect, that is to say that the ornaments, the text etc., on the prints have the appearance of throwing shadows on the remaining surface of the print, and therefore appear embossed in relation thereto. Further is it known to attain by this process, at the same time, that the background of the print appears with a certain patterned design. In this last nainedprocess, the manner of operation'is the following: first there are produced l, a diapositive whereon text and ornaments appear dark on transparent background, 2, a corresponding negative whereon the text appears transparent on opaque background, and finally 3, a plate showing, in various shadings, the design which it is desired to give to the background of the finished print. These three plates are now photographed together by diffused light passing through them, the text diapositive and the text negative being slightly transposed relatively to one another. The resulting negative may then be used for the direct transfer of the combined design onto the surface from which it is desired to produce the printing surface. This process, however, was not heretofore useful 1n practice, because it suffered from the drawback that the background design used was continued across the lucid portions of the letters and ornaments whereby a most disturbing and even destroying effect was produced, as the said design, belonging properly only to the background, also appeared prominently in the foreground of the final reproduction (the print), i. e. it appeared on the lucid and apparently embossed portions thereof.

The present invention has for its object a process whereby this drawback is avoided completely, and whereby the above described process is rendered useful in practice.

Specification of Letters Patent.

Application le October 14, 1911.

Patented Apr. *7, 1914.

Serial No. 654,749.

In the accompanyingy drawing illustrating the present invention: Figure l shows the first diapositive Fig. 2 a transparent plate with a pattern back-ground, Fig. 3 the resulting negative from plates l and 2, Fig. 4L, a negative resulting from plates l and 3 Fig. 5 a second diapositive and Fig. 6 a negative resulting from plates 3 and 5.

The different steps of the process are as follows: First a diapositive Fig. 1 is made in the usual manner, showing text, ornamentation &c. dark on clear background, and also a patterned plate Fig. 2 showing the background design in various shadings, may be as dark lines on clear background. These two plates are now photographed together, that is to say, they are laid closely on top of one another and photographed by diffused light falling through them, there being thereby produced a negative, Fig. 3 showing the background design and besides that also the text entirely clear, it is without the slightest trace of any pattern. The negative thus produced is then photographed together with the original text diapositive, they two being laidclosely together and slightly transposed, and diffused light being transmitted. I-Iereby, as it is easily seen, a new negative Fig. l is produced, showing text and ornaments, as well as the background design, but leaving the relief portions (ornaments, text Sac.) entirely free of the background design.

In many cases a portion of the text or the ornaments is to appear with such fine letters, or fine lines, respectively, that it wouldphardlylbe feasible to impart a relief effect to this portion of the text or the ornaments, as the lettering and ornaments would thereby become too indistinct. It may therefore be desirable to avoid any relief effect on certain portions of the plate. This may be attained in the following manner: Instead of making but a single textand ornamentation-diapositive, two such, exactly alike, are produced. On one of'these, see Fig. l the portions of the lettering and ornamentation which it is desirable to have appear on the final reproduction (the print) without relief effect, are removed entirely. The diapositive thus treated is now photographed together with the design plate, the resulting negative, see Fig. 3 showing the design and also (translucent) the portion of the text and ornaments which it is desired to have appear on the final reproduction (the print) in relief effect, but not the portion of the text and ornaments which are to appear thereon without relief effect. rlhe negative thus produced is nally photographed together with the second, not heretofore used, original diapositive represented by Fig. 5, the two plates being transposed relatively to one another, and thereby a negative plate represented by Fig. t3 is produced, showing partly the background design, partly the text and ornaments with relief and without pattern on the embossed (lucid) portions of this text or these ornaments, and partly teXt and ornaments, entirely without relief effect. F rom the plate Fig. 6 produced in this manner, printing surfaces may be produced, by further treatment of known kind, 'which will give prints, partly with embossed and partly with not embossed teXt and ornaments on a background not appearing in the foreground, t'. e. in the lighted, apparently embossed portions.

En the above, mention has been made of using only a single patterned plate, but even two such ones, with different designs, may be used simultaneously whereby most complicated effects may be attained.

Finally, printing surfaces may be produced, in the following manner, with two different designs, a'. e. with one background design and one foreground design the latter one appearing on the text and the lucid, apparently embossed, portions.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A. process of preparing negatives from a plurality of translucent plates, provided respectively with back-ground and indicia; which consists in first making a preliminary negative by light transmitted through super'- imposed back-ground and indicia plates, and then making a final negative by light transmitted through said preliminary negative and a superimposed indicia plate with the indicia slightly transposed relative to the indicia in the first negative.

2. A process of preparing negatives from a plurality of translucent plates, provided respectively with back-ground and indicia; which consists in first making a preliminary negative by light transmitted through superimposed back-ground and indicia plates, and then making a final negative by light transmitted through said preliminary negative, and another indicia plate superimposed thereon, with the -indicia corresponding to and in relative position slightly transposed from the position of the indicia in the first negative and with other indicia independent thereof.

3. A process of preparing negatives from a plurality of transparent plates; the first one. of said plates having in dark colors indicia to be printed with relief effect, the second plate similar to the first one but having in addition indicia to be printed without relief effect, the third plate having in dark color a pattern of the back-ground; the first step in the process consisting in making a preliminary negative by light transmitted through said third plate with said first plate superimposed, the second step consisting in making a second negative by transmitting light through said preliminary negative with said second transparent plate superimposed and slightly transposed; whereby on printing from said second negative, a print will be produced having indicia, some with and some without relief effect, on a uniform back-ground which does not show through said indicia.

The foregoing specification signed at Copenhagen, this 27th day of September, 1911.

NIELS BENDIXEN. Vitnesses:

JULiUs LEHMANN, Ovr GIERsING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

